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Aviation History
1909
1909 - 0676.PDF
OCTOBER 23, 1909. greater thrust than any other propeller on the market. I think it is very heavy, and does not compare favourably with a wooden propeller. I supplied a 6-ft. wood and metal propeller to the Empress Motor Co., Manchester, this week; it only weighed 6| lbs., and it will stand a greater breaking strain, and give a greater thrust, than any other wooden or metal propeller on the market. I have also supplied Patrick Y. Alexander, Esq., with three propellers, one of which he has tested on his spinning table ; and he tells me the travelling thrust is far in excess of the static thrust. I am not in a position to give the exact figures yet, but when the tests are completed I hope to publish them, with Mr. Alexander's permission. Youis faithfully, WILLIAM COCHRANE. In regard to Mr. Rogers' letter of last week, we received the following correction, too late for inclusion :— " Referring to our letter of October 8th, ' It appears the objection to metal propellers is in consequence of the possibility of hidden flaws appearing in the metal, but there are quite as many flaws in wood as in metal, and there have been several failures in wooden aeroplane propellers. Also the boss of a wooden propeller where the greatest strain occurs must, of necessity, be of metal.' The above paragraph should come in our letter after the words ' and are for those reasons most unreliable.' " Please omit the words ' The propeller used in "La Republique " was of this type.' " MODELS AT BLERIOT BANQUET. To the Editor of FLIGHT. : ••,. . SIR,—Referring to the banquet to M. Bleriot at the Hotel Cecil recently, we notice you state that all the models, in- cluding a very fine one of the Bleriot monoplane, were lent for the occasion by a single firm. In justice to ourselves we would inform you that the only Bleriot model lent was an exact replica (to one-sixth scale) of M. Bleriot's famous " No. XI." This was one of a number of scale models made by us, and was given the place of honour directly in front of the chairman. We had another monoplane scale model there which we had recently exhibited at Olympia ; and we were also pleased to notice two fine models, which, we believe, were by Mr. G. P. B. Smith, who did so well at Wembley Park on September nth. Yours faithfully, Kingston-on-Thames. T. W. K. CLARKE AND CO. STARTING A FLYER. - : To the Editor of FLIGHT. SIR,—When starting a flying machine from the ground are the propellers enough to get up the needed speed, or are the wheels connected with the engine ? As others who have not seen a full- sized machine may be also interested in the question, perhaps you would reply through your valuable paper. I am, yours truly, Dublin. A. COLE. [The thrust of the propellers is alone employed for starting, the wheels being totally unconnected with the engine.—ED.] TRIPLANE GLIDERS. To the Editor of FLIGHT. SIR,—The kindness of your letter is my excuse for troubling you further. My calculations for a glider (biplane) indicate a machine larger than I can conveniently handle. I would like to know if there is any practical objection to a triplane, to reduce the width of the machine. Faithfully yours, West Wycombe. CHAS. E. DAWSON. [While there is not, so far as we can say, any objection to a triplane, from a constructional point of view a very short span glider might prove more difficult to control in respect to lateral stability; the experiment would be interesting and instructive.—ED.] LIGHT MOTORS A.ND WING MOTION. To the Editor of FLIGHT. SIR,—Could you tell me how light it is possible to construct a motor of ^-h.p. ; also how much h.p. does a pigeon develop in full flight, and how often does it flap its wings per minute ? Yours truly, Holborn. NOVICE. PUBLICATIONS RECEIVED. Aeriai Navigation of To-Day. By Charles C. Turner. London : Seeley and Co., Ltd. Price y. net. <<a| The Conquest of the Air. By Alphonse Berget. London : William Heinemann. Price 12.?. 6d. net. Actions and Reactions. By Rudyard Kipling. London : Macmillan and Co., Ltd. Price 6s. ® @ ® ® NEW COMPANIES REGISTERED.Brighton International Aviation Club and Grounds, Ltd.—Capital ^300, in £\ shares. Manufacturers of and dealers- in aeroplanes, flying machines and balloons, club proprietors, &c.Nicholson Aeroplane Syndicate, Ltd.—Capital ,£1,500, in £1 shares (300 founders'). Formed to acquire from A. H. Nicholson the benefit of a certain invention for improvements in flying machines, &c. First directors, A. E. M. Haes and N. E. Holden. .-, •.. Aeronautical Patents Published. Applied for In 1008. Published October i$th, 1909. 9*?7 A. J. FREDRIKSON. Flying machines or airships. 21,618. J.DONOVAN. Mode of and apparatus for flying. Applied for In 1000. Published October 7th, 1909. 3,202. J. MEANS. Controlling apparatus for flying machines.13,670. K. L. W. GEEST. Airships or flying machines. Published October i\th, 190J. 19,822. Soc. ANON. "ASTRA." Feeding ballonets on airships. BACK NUMBERS OF FLIGHT." SEVERAL back numbers are now becoming very scarce, and when exhausted no more complete sets will be procurable. The publishers have pleasure in announcing that they have secured a few of these back issues of FLIGHT, and any of our new readers who may wish for sets, No. 1 to date, except Nos. 3, 4, 12, 15, and 16, but including the numbers containing full description and Scale Drawings of the Bleriot, the Curtiss, Voisin, and | Cody biplanes, the Wright full-size glider, and of Santos Dumont's " Demoiselle" monoplane; can obtain same for 6s. 2d., post free (abroad js. &d.). Complete sets to date, including all the above and in addition the scarce higher-price numbers : Nos. 3, is. 6d. ; 4, is. 6d. ; 12, is. 6d. ; 15, is. ; and 31 (with scale drawings of the Bleriot cross-Channel flyer, 2^.), but exclusive of No. 16, which is now obtainable in bound volumes only at the end of the year, and is otherwise out of print, can be obtained for 12s. $d., post free (abroad 14?. 2d.) from the Publishers, 44, St. Martin's Lane, W.C. The publishers have only a limited reserve stock foi bound volumes at end of year. Those wishing, there- fore, to ensure obtaining Volume I complete, with Index and Title Page, can book same now at the price of One Guinea, bound in cloth boards. Orders will be booked for these in rotation as received. As varioui numbers become scarce the price will be raised accordingly. Bleriot Number separately, 2s. FLIGHT. 44, ST. MARTIN'S LANE. LONDON, W.C. Telegraphic address : Truditur, London. Telephone: i828Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates: — UNITED KINGDOM. ABROAD. 36 12 Months, Post 1) Free s. ... I ••• 3 ... 6 d. 8 3 6 36 12 Months, ,, it Post Free ... • a •> * s. 2 5 IO a\ 6 o oCheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London and County Bank ; otherwise no responsibility will be accepted. 678
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